Adjustable brake-head.



J. W. WEINLAND. ADJUSTABLE BRAKE HEAD. APPLICATION FILED Nov. 28, 1914.

Patented une 22 1915.

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rosnrn w. wnrn'nann, or cnrcaeo, unrave s, assrenega. re ama gam 'ST-EEL remains, or NEW YORK, N. Y., a coltlpm'rronor tnwmnsnr.

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Z whom it may concern: I e it known that I, JosEPH W. WEiNLAN'D,

citizen ofthe UnitedStates, and resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in'Ad uStabIe Brake Heads, of which the following is a speci-" fication.

My invention relates to brakes and has particular reference to a novel adjustable I brake head for use in connection therewith. f

In the patent to Fowler, No. 990,855, of May '2, 1911, a construction is disclosed which is quite similar to that herein illustrated, except in that the wedge members which secure the parts in locked engagement are positively held by screw means.

An object in the present construction 1s to improve the brake head there disclosed, by the provision of resilient means whereby the wedge members shall be forced into engagement and maintained in such engagement without the possibility of becoming I loose, due to limited wear, whichhas been found to be present in all devices wherein the locking element is positively advanced without the association therewith of spring means...

The construction will be more readily understood by referring to the accompanying drawings, whereina Figure 1 .is a transverse vertical view through a "brake head constructed in accordance with my invention, andFig. 2 is a front elevation of the construction shown in Fig. 1.

Referring more. particularly to the draw- 'ings," it will be seen that I may mount the head 10 on a sleeve 11 having an incomplete peripheral groove 12 therein. In the lower portion of the head I provide a recess 13 open at its forward end to the face of the head. Within such recess I mount a. combined spring barrel and wedge member, con

sisting of.a cylinder 14 with an integral inclined plane 15 onthe top thereof. As shown in Fig. 2, the cylinder is so shaped as to provide legs or bottom flanges lfi which bear against the floor of the recess 13. The wedge portion- 15 may be hollowed out asat 17 for lightness, if desired. Codperating with the wedge portion 15"is a block 18 having.

an arcuate upper surface bearing against the sleeve 11, the u )per edge of the block being normally seate within the groove 12.- The isp'ecification of hietters'fatent' Application filed November 28, 1914. Serial No. 871,471

spring will compensate A -urn r: ARE-HE lower surface of the block 18 is an inclined plane and cooperates with thesimilar surface of the member 15. Mounted within the cylinder 14- is a helical spring 19 and a bolt 20 mounted concentrically within the cyllnder, 1ts head bearing against the spring.

The belt projects through an o ening 21in the brake head and is engage outsidethe the b0 t may be drawn up, force being exerted on the spring and transmitted to the wedge members, the resultant of the force head b a suitablenut 22 by means of which I being a line directedtowardthe axis of rota tion of the head, In order to prevent the accidental withdrawal 0f either the bolt or the cylinder, I provide a transverse key 23L With the key in position it will be seen that the wedge member 18 will not be 'allowedto descend sufficiently to be disengaged from the groove 12 in the'sleeve, and that, therefore, even though the nut 22 should become lost or spring 19 broken, the head wouldstill be held .in place on*the sleeve: It will be noted also that even though the nut 22,,

should become lost or loosened, the locking means would still be effective inasmuchas By means-of the construction shown, the parts are wedged securely in position through a spring force, and, therefore such prevent the possibility of the head becoming loose in service. I claim: 1. Ina device of the class described, the

combination of a bearing having a peripheral groove, a headrotatably mounted onsaid bearing, said head being provided with a recess in its lower portion, a pair of wedge said wedge members into engagement with said bearing, substantially as described.-

' 2. In a device ofthe class described, the

for any wear and the key 23, would maintain the spring under a certain degree-of compression.

combination of a bearing, a head rotatably mounted on said bearing, said head having a recess in itslower portion, a pair of wedge members mounted in said recess, one of said members being hollow, a spring mounted in said hollow'wedge member, and a bolt acting on said spring and tending to force said wedge members into engagement with said bearing, substantially as described,-

3. In a device of the class described, the

, combination of a bearing, ahead rotatably mounted on said bearing, a pair of cooperating Wedge members mounted in the lower portion of said head, a coil spring mounted internally of one of said Wedge members,

JOSEPH W. WEINLAND.

Witnesses:

CHAS. F. MURRAY,

T. I). BUTLER. 

